Knife-bar for beating-engines.



H. R; SIMONDS.

KNIFE BAR FOR BEATING ENGINES.

APPLICATION FILED MAR. 10. 1915.

l v I 9 Patented Aug. 10, 1915.

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H. R. SIMONDS. .KNIFE BAR FOR BEATING ENGINIES} APPLICATION FILED MAR. 10. 1915. 1,149,791 Patented 10, 1915.

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UNITED STATES PATENT OFFICE.

HERBERT R. SIMO'NDS, OF DAYTON, OHIO, ASSIGNOR TO THE A. A. SIMONDS & SON CO.,

' OF DAYTON, OHIO.

' KNIFE BAR non EATING-Enemies;

To all whom it may concern; f v v Be it known that I, I'IERBERT R. SIMONDS, citizen of the United States, residing at Dayton, in the county of Montgomery and State of Ohio, have invented certain new and useful Improvements in Knife Bars for Beating-Engines; and I do hereby declare the following to be a-full, clear, and exact description of the invention, such as will enable others skilled in the art to which 1t appertains to make and use the same.

My invention consists in the novel features hereinafter described, reference being had to the acompanying drawings which show one embodiment of my invention selected by me for purposes of illustration, and the said invention is fully disclosed in the following 1 description and claims.

the knife bars.

Referring to the accompanyingdrawings,

Figure 1 represents so much of a beating engine ormacerating device for paper pulp, as is necessary to be shown in order that a complete understanding of my invention may be had, the said figure showing a portion of the tank with one side removed and the cylinder being provided with my improved knife bars and fillingblocks hereinafter described. Fig. 2 represents a section on line 2-2 of Fig. 1. Fig. 3 is a detailed sectional view .of a portion ofthe mechanism showing a part of the beating cylinder, the stock portionof a couple of knife bars mounted therein, a portion of one of the retaining rings for the knife bars and a pair'of the filling blocks provided between Fig. 4 is a perspective view of a portion of my improved knife bar illustrating one end of the same and showing in dotted lines the relation of the spacing blocks and retaining ring thereto. Fig. 5. is a transverse sectional view of my improved knife bar, portions of the spacing blocks, and the location of the retaining ring being indicated in dotted lines. Fig. 6 is an edge view of a portion of the knife bar looking at the cutting portion thereof.

One of the objects of my invention is to I provide an improved knife bar for use in mercial machine now in use. The knife bar is curved or bent in the direction of its width and is providedwith a transversely corrugated edge portion of novel construction and isparticularly designed to produce,

in conjunctionwith the stationary lmives of Specif cation of Letters Patent. Patented A 10 1915 the machine, a wipingor sweeping action caused 'by holding the. knife bars in the cylinder so that they extend rearwardly of a radial positlon'therein. Means are also provided for msurmg that the material,

. which has a tendency to collectbetween the adjacent blades of the. cylinder, shall be contmuouslythrown outward by the blades, whereby all portions of the pulp may be acted upon in the most uniform manner.

The particular advantages derived from curving or bending, the bar in the direction of its width are that increased suction will be obtained in the beating engine; that no air will be trapped by the roll, thus insurmg that the throats will be completely filled; and that less power will be necessary to revolve the roll owing to the bars entering and leavmgthe material at an angle.

A particular feature of my invention resides in curving or bending the bar in the direction of its width, which may be done in a straight bar, or preferably in a corrugated bar.

Another object of my invention is to provide an improved filling betweenthe knife bars which will allow of the more ready introduction of thefilling between the bars and which when driven into place will more IEffectively fill the spaces between the knife ars.

In Figs. 1 and 2, I have shown a portion of a beating engine or macerator in order that my invention may be clearly understood. In said figures, 1 represents a tank for holdin the pulp, he forward side of which has een removed to disclose the in- -terio'r, and 2 represents the usual central partition of the tank around which the material circulates.

3 represents the stationary knives, or bed and 4 represents the beating cylinder which is of usual construction and comprises a plurality of disks 5, mounted on a' shaft 6,

supported in vertically adjusted bearings 7 of any desired construction above the -,bed 3. The cylinder disks 5, are provided and diverging therefrom outwardly from the bottom of the recess. In accordance with my invention the drum is so located that when rotated in the direction of the arrow, Fig. 1, the radial side of the recess will be on the forward side of the blade, having reference to the direction of rotation. For convenience of reference herein, I will designate the substantially radial wall of the recess as the straight wall, and the opposite wall as the inclined wall which will be readily understood with reference especiallyv to Fig. 3', and referring to the knife bar hereof I will designate the leading face having reference to the direction of rotation as the forward face of the bar and the opposite face asthe rear face of the bar. The several knife bars after being placed in engagement with the recesses of the disks 5, are held in place therein by rings 8 (see Fig. 2) which engage recesses in the ends of the knife bars and clamp them firmly to the outermost disks, said rings being ordinarily shrunk on to said disks and bars and the bars are further held in place by wooden wedge blocks 9, which are driven between them.

My improved knife bar is illustrated in detail in Figs. 4, 5 and 6 which show an embodiment of my inventionselected by me for the purposes of illustration. The knife bar 10 is formed of any suitable material and is curved or bent in the direction of its width.

The bar is an integral construction of two portions, which for convenience I designa'te as a stock; portion 11, and the edge or blade portion 12, the stock portion being that portion which engages the recesses in the cylinder and lies between the spacing blocks or wedges thereof, and the edge portion being the portion which projects beyond the wedge blocks.

, The stock portion of the bar has two plane faces, 11? and 11", the face 11 being disposed perpendicularly to the inner edge 11 and the outer edge 12 and the face 11 being disposed angularly to the face 11 and diverging therefrom outwardly from the inner edge 11 and being so shaped as to fit the recesses in the cylinders now in ordinary use in this class of machines. The stock portion of the bar is provided at each end with a recess or notch 11, leaving a tongue 11*, between said recess and the inner edge 11 which is of slightly greater depth than the recess, so that the retaining rings when shrunk in position will have a firm engagement with said tongue and firmly hold the bars in place. The edge portion 12, of the bar .is provided with corrugations extending transversely of the length of the bar, the alternating corrugations having their axes disposed angularly to each other, indicated by the dotted lines, w-m and y-y in Fig. 5, and diverging from each other outwardly from thestock portion.

In the preferred form of my improved bar, those corrugations which present their convex faces to the forward side of the bar, hate the apices of said convex faces curved or inclined away from the forward face 11" of the stock portion. The alternate corrugations which present their concave faces 12 to the forward side of the bar have said faces disposed angularly to the plane of the rear face 11 of the stock portion, the said corrugations being given a rake outwardly and rearwardly for a number of different purposes, viz., to prevent air from being trapped in the throats, to produce a wiping action on the pulp as the knife bars pass over the stationary bed 3, as clearly shown in Fig. 1, to cause said rearwardly bent corrugated portions of the bars to so act upon the material, during the revolution of the cylinder as to throw outwardly the material between adjacent blades of the cylinder and prevent it from traveling around and around with the cylinder, and that less power will be necessary to revolve the roll owing to the bars entering and leaving the material at a retreating angle.

The corrugated edge portion 12, of the blade is made much thinner than the stock portion and is given a substantially uniform thickness for a distance back from its outer edge in order that the outer edge of the face 12, may be ground when necessary without increasing the width of said face. The said corrugated portions are, however, gradually made thicker adjacent to their line of union with the stock portion, thereby forming curved or inclined shoulders 12 and 12 which terminate at the line of union with the stock portion indicated by the dotted line 10 in Fig. 1 at which point the bar has its greatest thickness. It will thus be seen that the shoulders 12 and 12", in conjunction with the thick end of the stock into which they merge form braces which greatly strengthen and reinforce the corfaces which assist in throwing the material between the adjacent blades of the cylinder outward. It will also be noted that the convex portions of the corrugations, on the for- Ward side of the bar or blade, have a tendency to crowd the material in opposite directions longitudinallyof the blade andinto front face 11,-

contact with the shoulders 12 and concave faces 12*, and contribute to this important result.

In placing my im )roved bar in the recess of the cylinder I prefer to place it with the of the stock portion, which is the inclined face of the stock portion, in engagement with thestraight face of the recess, the straight face 11 of the bar being in contact with the inclined face 5 0 the recess, as this in combination with the bend in the bar, imparts a rearward rake to the entire bar and tends to give it the sweep:

.ing or wiping action beforedescribed as well as forcing the material outwardly from the cylinder so as to rake backward the advanced portions of the outermost edge 12 extend outwardly greater distance than the rearmost portions of said edge. Hence in looking down upon the corrugated edge, the outer extremity thereof appears to be'slightly curved and as the edge passes over the straight faces of the knives of the bed' 3, opportunities are provided for the material to continually redistribute itself as it is acted upon, and thus a more uniform treatment of'the pulp is effected.

By reference to Fig. i it will be observed that in the rotation of the cylinder the cor rugated knife bars approach the bed 3, with a wiping or sweeping action which disintegrates the fibrous material without cutting or shearing the fibers thereof, and it will also be seen that the material which necessarily is collected between the adjacent blades of the cylinder will be discharged top edge of the concavetherefrom over the portion 20, the material then passing around the center partition 2, and being continuously treated until the proper degree of maceration has been attained.

After the knife bars have been placed in position upon the disks 5 and secured by the retaining rings. 8, the wedge blocks or wood fillings 9 are driven into place. I prefer to place a plurality of filling blocks between adjacent knife bars and these blocks are both wedge shaped, or

between the knife bars one-of the same A, is placed next to the rear face of one of the bars and the other block B is driven in between said block A and the front face of the adjacent knife bar. The water in the trough swells these blocks and causes them to additionally secure the bars in their places.

By using a plurality of filling blocks bebars the blocks may be tween the adjacent securely inserted and held without being interfered with by the rearwardly bent 'cutting edges of the knife bars, which would prevent a single block of sufficient size being driven between the knife bars.

, By thus setting the bars in from the cylinder av one wedge shaped and the other oblong. In placing the blocks 7 What-I claim and desire to secure by Let ters Patent is 1. A knife bar curved or bent in the direction of its width. 2. A knifebar for beating engines com prising a stock portion to engage the heating cylinder stock portion, gated transversely of the-length of the bar, and the alternate corrugations having their fixes diverging toward the outer edge of the ar. i r I 3. A knife bar for beating engines comprising a stock portion to engage, the beating cylinder and an edge portion of reduced and'an edge portion curved or bent outwardly and rearwardly from said the edge portion being corruthickness extending along the outer portions of the bar, and corrugated transversely' of the length of the bar, the entire edge portion being arranged at an angle to the'stock portion, and'the alternate corrugations having their axes inclined to each other, said axes diverging toward the outer edge of the bar.

4. A knife bar for beating engines 'comprising a stock portion to engage thebearing cylinder and a reduced edge portion corrugated transversely ofthe length of said bar, the entire edge portion being arranged at an angle to thestock portion, the alternate corrugations having their axes disposed angularly to each other anddiverging toward the outer edge of the knife bar, said corrugations increasing in thickness at their junction with the stock portion, forming in:-

clined shoulders for reinforcing theedge portion of the bar and assisting in discharging material from between adjacent bars of a cylinder. t

5. A knife bar for beatingengines comprising a stock portionto engage the beating cylinder having itsfront and rear faces disposed angularly toieach other and verging from the inner edge of thebar outwardly, and a reduced edge portion corrugated transversely of the length of the bar, the entire edge portion being arranged at an angle to the stock portion, the alternate corrugations having their axes disposed angularly to each other and diverging outwardly from the stock portion, said corrugated portions being gradually increased in thickness adjacent to their union with the stock portion to form inclined shoulders for assisting in discharging material from between adjacent bars "of a cylinder, said bar having its greatest of said shouldered portion.

6. A knife bar for beating engines comprising a stock portion to engage the heating cylinder and an edge portion of reduced thickness, the entire edge portion being arranged at an angle to the stock portion, said edge portion being corrugated transversely of the length of the bar, the

portions with the stock alternate corrugations having their axes dis-- posed angularly to each other and diverging from their union with the stock portion outwardly, the corrugations presenting their concave faces toward the forward face of the bar having their forward faces inclined outwardly and rearwardly with respect to they versely of the length of the bar, the alter-' nate corrugations having their axes disposed angularly to each other and diverging from.

their union with the stock portion outwardly, the corrugations presenting their concave faces toward the forward face of the bar having the portions nearest the stock portion set. in from the plane of the rear face of the stock portion, and their axes inclined v outwardly and rearwardly therefrom with tire edge portion being arranged at an angle I respect to the plane of the rear face of the stock portion to impart a wiping action to the material and to assist in throwing the material outwardly.

8. In a beating engine, the combination v'ith the cylinder provided with knife'receiving recesses, of a knife bar having a stock portion to engage said recesses, and an edge along the outer portions of the bar, the ento the stock portion, and corrugated transversely of the length of the bar, the alternate corrugations having their outer faces in-- clined to each other and diverging toward the outer edge of the bar, said stock and recesses being constructed to hold the knife bar in such position that the forward faces of the concave portions of the knife bar will extend rearwardly of a radial position,

to facilitate the discharge of material from between adjacent knife bars.

9. In a beating engine, the combination I with the cylinder provided with knife receiving recesses, of a knife bar having a stock portion to engage said recesses and an edge portion of reduced thickness extending along the outer portions of the bar, and cor- 1 from outwardly portion of reduced thickness extending cesses being constructed to hold the knife bar in such position that the axes of the convex portions of the forward face of the bar will not extend forward of a radial position, and the axes of the concave portions will extend rearwardly of a radial position, to facilitate the discharge of material from between adjacent bars of the cylinder.

10. In a beating engine the combination with the cylinder provided with knife receiving recesses, each having one face disposed substantially radially and the opposed face inclined thereto and diverging therefrom the bottom of the recess, of a knife bar having a stock portion provided with a longitudinal face disposed at an angle to the edge faces of the knife bar and the opposite face inclined thereto and diverging therefrom outwardly from the inner edge of the bar, said bar having an edge portion of reduced thickness corrugated transversely of the length of the bar, the alternate corrugations having their axes disposed angularly to each other and diverging outwardly from the stock portion," the entire edge portion being arranged at an angle to the stock portion,

said bar having the perpendicular face against the inclined face of the engaged recess, and means for securing said bar in said recess.

11. In a beating engine, the combination with the cylinder provided with a series of knife bars, of a plurality of filling blocks arranged between adjacent knife bars, the meeting faces of the blocks being radial of the cylinder.

12. In a beating engine, the combination with. the cylinder provided witha series of knife bars bent in the direction of their width, of oblong blocks arranged adjacent to the rear face of each wedge shaped blocks arrangedbetween said first named blocks and the forward faces of the bars. Y 1

In testimony whereof I affix my signature, in the presence of two witnesses;

HERBERT R. SIMONDS. Witnesses: i

' HENRY H. HOLLENCAMP,

EUGENE G, KENNEDY.

of said bars, and 

